1. In a microwave-safe mug, combine the almond flour, cocoa powder, powdered sweetener, baking powder, and salt. Mix well to ensure there are no lumps.

2. Add the melted butter to the mug and stir until the dry ingredients are well coated.

3. Crack the egg into the mug and add the vanilla extract. Mix thoroughly until all ingredients are well combined.

4. Stir in the almond milk to achieve a smooth batter consistency.

5. Microwave the mug on high for around 60-90 seconds, depending on your microwave’s power. Keep an eye on it to avoid overcooking.

6. Once the cake has risen and is firm to the touch, remove it from the microwave and let it cool for a minute.

7. Top with sugar-free whipped cream, berries, or chopped nuts if desired.

8. Enjoy your delicious Keto Chocolate Mug Cake straight from the mug!

Note: The cooking time may vary depending on your microwave, so adjust accordingly. Also, feel free to experiment with additional flavors like adding a pinch of cinnamon or a few drops of sugar-free chocolate syrup to enhance the taste.